gear ratio

  1. A

    Clutches

    Can you use a standard centrifugal clutch with a rear sprocket size of like 36? I know Its bad for it but I dont have the money for a racing clutch. Looking for a better top speed!
  2. CJdoodlebug90

    Tav2 gear ratio...top speed

    Ok so i have a drag mini bike...15hp with a tav2 12t. After install i know i need stiffer springs all around. I still have stock doodlebug rear sprocket (70t). To get more top speed would i go up in rear sprocket size or down? I plan on running bike in the 1/8 and before i installed tav2 i...
  3. M

    Sprocket problem!

    Hi New here. I am currently building a mini bike but I need help with gear ratios and what number of teeth I should put on each sprocket. I need your help to determine what number of teeth I should put on my sprockets. Please can you suggest a number of teeth for each of the following...
  4. CJdoodlebug90

    Gear ratio for 1/8 drag?

    I estimate im making around 11hp..I know thats not alot but its just a start. Right now I have a 15 tooth clutch with a 70 tooth sprocket. What rear sprocket would give me max top speed in 1/8 mile? My weight is 215lbs
  5. CJdoodlebug90

    How Much Horsepower? Gear ratio?

    I have a 212cc non hemi and I want to know how much hp im making. And once I know how much hp im making I need suggestions on 1/8 gear ratio (clutch to sprocket) Currently have 12t clutch 70t sprocket Dyno cams - mod2 18lbs springs (26lbs on the way) E tube and .32 jet 2 degree timing key...
  6. CJdoodlebug90

    Jackshaft questions

    Ok i have a modded preadator on a mtd trail flite...which is somewhat like a rupp. Mini bike has a jackshaft setup and when i got bike i had to restore it so didnt know the exact gear ratio. So...the ratio i have now is: 12th clutch, 14th jackshaft to 10th, and 60th rear sprocket. When im...
  7. F

    Gearing??

    I am wondering what sprockets i should be using on my minibike for decent low end and decent top end speed..It has a jack shaft and i currently have a 12 tooth clutch..Facing the jack shaft from behind i have an 18 on the left and a 13 on the right the engine goes to the 18 tooth and a 40 tooth...
  8. G

    Torque converter

    I have a db30 with a 6.5 clone with a stock rear sprocket. What size torque converter should i get, the 10 tooth or the 12 tooth. I'm really bad when it comes to gear ratio. What are the pro's and con's with each. Thanks
  9. hotroded

    different teeth on clutches

    i have a big sproket on the rear of my mini bike , its supposed to be 72 teeth i think. i just recently i picked up 3 different clutches 12, 13, 14, teeth . how will this change the ratio on my mini bike up or down ? i know the smaller gear in the back is supposed to make more top end. am i...
  10. P

    New to the forum, got some ?'s

    Hi guys, pretty new here (i know the account has existed a while but i kinda fell away from my minibike) Anyways, I just have a couple of questions that I need some help answering. OK, so. i have a Mitsubishi 6.5hp motor out of some walmart mini bike (looks to be a honda gx200 clone) and...
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